Add a common trace event entry which have only one __string field,
it allow create APIs base on it to add trace events for
usb gadget and function layer, then it will cover all user input
like make configfs group/item, drop item, write attribute, allow/drop link.
Signed-off-by: Linyu Yuan <quic_linyyuan@xxxxxxxxxxx>
---
v2: no change
v3: add trace.c and configfs.c will not include trace.h
v4: no change
drivers/usb/gadget/Makefile | 2 ++
drivers/usb/gadget/trace.c | 8 ++++++++
drivers/usb/gadget/trace.h | 39 +++++++++++++++++++++++++++++++++++++++
3 files changed, 49 insertions(+)
create mode 100644 drivers/usb/gadget/trace.c
create mode 100644 drivers/usb/gadget/trace.h
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 33f1ef9..b426f5c 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -8,5 +8,7 @@ subdir-ccflags-$(CONFIG_USB_GADGET_VERBOSE) += -DVERBOSE_DEBUG
obj-$(CONFIG_USB_LIBCOMPOSITE) += libcomposite.o
libcomposite-y := usbstring.o config.o epautoconf.o
libcomposite-y += composite.o functions.o configfs.o u_f.o
+CFLAGS_trace.o := -I$(src)
+libcomposite-y += trace.o
obj-$(CONFIG_USB_GADGET) += udc/ function/ legacy/
diff --git a/drivers/usb/gadget/trace.c b/drivers/usb/gadget/trace.c
new file mode 100644
index 0000000..8b4b1db
--- /dev/null
+++ b/drivers/usb/gadget/trace.c
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#define CREATE_TRACE_POINTS
+#include "trace.h"
+
diff --git a/drivers/usb/gadget/trace.h b/drivers/usb/gadget/trace.h
new file mode 100644
index 0000000..d556580
--- /dev/null
+++ b/drivers/usb/gadget/trace.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM gadget_configfs
+
+
+#if !defined(_GADGET_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _GADGET_TRACE_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(gadget_configfs,
+ TP_PROTO(char *info),
+ TP_ARGS(info),
+ TP_STRUCT__entry(
+ __string(info, info)
+ ),
+
+ TP_fast_assign(
+ __assign_str(info, info);
+ ),
+
+ TP_printk("%s", __get_str(info))
+);
+
+#endif /* _GADGET_TRACE_H */
+
+/* this part has to be here */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+
+#include <trace/define_trace.h>
--
2.7.4
